<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>Dear all, </div>
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<div>my name is Matthias and I am relatively new to the field of EEG analysis. I'm currently carrying out a study on the effects of natural sounds on the quantitative EEG in patients with Parkinson's disease at the universities of Vanvouver and Marburg. </div>
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<div>Right now I'm experiencing these weird artifacts as seen in the screenshot. It's sharp spikes, looking similar to ECG artifacts, but in frequencies of 7-12Hz. </div>
<div>They are also showing up in the independent components after ICA as well. </div>
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<div>The recording was done at a sampling rate of 500 Hz, I've applied a Band-Pass filter from 1-249Hz and two notch filters, 60 and 120 Hz (recording took place in Canada). </div>
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<div>Has anyone seem similar artifacts before and maybe even knows how to get rid of them?</div>
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<div>Many thanks in advance and all the best,</div>
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<div>Matthias</div></div></body></html>